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WorksheetsReview Quiz in Fourth Quarter Science for Grade 8
Total questions: 60
Worksheet time: 45mins
Taxonomists devised a system of naming and classifying organisms so that researchers will
be able to get the exact information on a particular organism.
be confused in looking for the characteristics of an organism.
have easy access on the information that they will need about an organism.
All are possible answers.
Advantages of using the garden pea from Mendel’s experiments included the following EXCEPT _________.
sex organs of the pea plant are enclosed within the flower
he could expect to observe segregation of traits among the offspring
they have relatively short generation time
true – breeding varieties were scarce
What kind of diversity is represented by all the different genes found in a population?
Ecosystem Diversity
Biodiversity
Species Diversity
Genetic Diversity
A pyramid of numbers show that in an ecosystem there are_______
always a large number of producers at the bottom and fewer top consumers.
always a large number of top consumers and fewer consumers.
an equal number of producers and consumers.
more top consumers than primary consumers
For a given trait, the two genes of an allele pair are NOT alike, an individual possessing this gene combination is said to be____.
Homozygous for the trait
Heterozygous for the trait
Recessive for the trait
Pure for the trait
In which digestive organ is chime produced?
Mouth
Stomach
Small intestine
Large intestine
The way of naming organisms is referred to as____
Classification Key System
Species Name of Classification
Two Name System of Classification
Binomial System of Classification
Which of the following statements about human reproduction is TRUE?
Sperm and ova are zygote.
Meiosis takes place on females only.
Mitosis in males is also known as spermatogenesis.
Oogenesis takes in the ovaries of females while spermatogenesis takes place in the testes
Based on the results of Mendel’s Experiment, what principle of heredity supports his findings on the phenotype expressed by the offspring in the F1 generation?
Principle of Dominance
Principle of Segregation
Principle of Unit Character
Principle of Independent Assortment
The scientific name for the African elephant is Loxodonta africana. What is the species’ name?
Loxodonta
africana
Africana L.
Loxodonta sp.
Which of the following is properly paired?
Chemical digestion begins - mouth
Absorption of all types of food takes place - small intestine
Digestion of fats begin – large intestines
Have high acid content – stomach
Which of the following lists the Taxonomic categories from smallest to largest?
Phylum, order, genus, kingdom, family, species, class
Kingdom, phylum, class, order, family, genus, species
Species, genus, family, order, class, phylum, kingdom
Class, kingdom, phylum, family, order, species, genus
Somatic cells produced by_________, while sex cells reproduce by ___________
Meiosis; mitosis
mitosis; mitosis
Mitosis; meiosis
Meiosis; meiosis
Widows peak (W) is dominant over straight hairline (w). What is the genotype of child if the father is homozygous for the trait and the mother has a straight hairline
WW
Ww
Www
ww
Which of the following lists the 6 kingdoms from the most complex to the simplest?
Animals, Fungi, Plants, Protists, Archaebacteria, Eubacteria
Animals, Plants, Fungi, Protists, Eubacteria, Archaebacteria
Archaebacteria, Eubacteria, Protists, Fungi, Plants, Animals
Eubacteria, Archaebacteria, Protists, Fungi, Plants, Animals
Some life forms in this Kingdom can survive in extreme environments including hot springs, salt water lakes and intestines of animals.
Archaebacteria
Bacteria
Fungi
Protists
A homozygous tall man marries a heterozygous tall woman. If they have 12 children, how will their children look like based on the result of Mendel’s experiments?
All tall
9 tall and 3 short
All short
6 tall and 6 short
Digestion begins in the mouth. Which of the following statements is INCORRECT?
Tongue aids in the digestion of food.
The saliva changes some of the starches in the food to sugar.
The digestive juices can react more easily with the food when chewed.
The tongue keeps the food in place in the mouth while the food is being chewed.
All of the following are types of archaebacteria EXCEPT_________
Halophiles
Mathanogens
Thermophiles
Bacteria
Which of the following is NOT a function of mitosis in humans?
Repair of wounds
Growth and development
Production of gametes
Replacement of lost damaged cells
Members of Eubacteria are classified according to shape. Which of the following is NOT in correct order?
Coccus – spherical shape bacterium
Bacillus – straight-rod shape bacterium
Spirillum – spiral filamentous shape bacterium
Staphylococcus – spherical-filamentous shape bacterium
Brown eyes is dominant over blue eyes, if a homozygous brown eyed man married a homozygous blue-eyed woman, what is the probable phenotype of their offspring?
25 % is brown eyed
50% is brown eyed
75 % is brown eyed
100% is brown eyed
Which of the following is NOT a function of the liver?
Storing food
Manufacturing insulin
Producing digestive juices
Healing itself when it is damaged
A food web is more realistic than a food chain for showing the feeding relationships in ecosystems because
food chains use only as small sampling of organisms.
food web explains why there are more producers than consumers.
it compares the number of consumers to the number of microorganisms in an ecosystem.
Producers are usually eaten by many different consumers and most consumers are eaten by more than one predator.
Which of the following statements is TRUE?
I. The chromosome number of daughter cells in mitosis is the same as in the parent cell
II. The chromosome number of the daughter cells in meiosis is half that of the parent cell
Neither I nor II
I but not II
Both I and II
II but not I
Meiosis II is similar to mitosis because_____
sister chromatids separate
homologous chromosomes separate
DNA replication precedes the division
they both take the same amount of time
Digestion takes place in the alimentary canal or digestive tract. Food travels through these organs in the following order:
Mouth, esophagus, stomach, small intestine, large intestine, and rectum
Mouth, esophagus, stomach, large intestine, small intestine, and rectum
Mouth, stomach, esophagus, small intestine, large intestine and rectum
Mouth, stomach, esophagus, small intestine, large intestine, and rectum
Which of the following would be MOST effective in slowing the loss of biodiversity?
Freezing fertilized eggs of endangered animals in case the species become extinct in the wild
Setting aside plots of land in a variety of ecosystems, such as forests, grasslands, and marshes
Creating large parks/preserves in biodiversity hotspots
Requiring every country to maintain a seed bank
Dominant: expressed ; _______: masked
Conducive
recessive
Extensive
intensive
Which of the following is NOT a shared characteristic of protists?
Heterotrophic
Multicellular
Prokaryotic
Unicellular
Which of the following is INCORRECT? Monocots have
no secondary growth.
a taproot rather a fibrous root system.
leaves with parallel veins rather than the branching venation.
scattered vascular bundles in the stem rather than the bundles in a ring.
Which of the following best describes biodiversity? It is the _______
study of life.
number of plants and animals throughout the world.
different eukaryotes and prokaryotes existing throughout the world.
variety of species, their genetic make-up, and the natural communities in which they occur.
Which selection includes all the accessory organs of the digestive system?
Liver, thyroid gland, gall bladder, spleen.
Gall bladder, liver, pancreas, salivary glands
Salivary glands, thyroid gland, pancreas, liver
Stomach, duodenum, pancreas, gall bladder
Which of the following shows a cross between two pure-bread individuals?
aa x Aa
Aa x Aa
AA x AA
Aa X AA
Red tides are dangerous because_____
some algae feed on the tissues of fishes and shellfish.
algal toxins are concentrated in the bodies of animals that eat them.
the algae prevent sunlight from reaching plants beneath the surface.
the algae use up oxygen, causing fish and other organisms to suffocate.
Which of the following is NOT a characteristic of fungi?
Eukaryotes
Heterotroph
reproduce with spores
makes its own food
Invertebrates include_____
all animals with backbone.
only animals that use hydrostatic skeletons.
all animals except for the phylum vertebrata.
members of the parazoa, radiata and protostomes, but not of the deuterostomes.
Why do vegetarians combine different protein sources or eat some eggs or milk products? It is to ___
provide sufficient vitamins.
make their diet more interesting.
make sure they obtain sufficient calories.
provide all essential amino acids at the same time.
Which of the following best differentiates vascular and nonvascular plants?
I. Vascular plants can make their own food while non-vascular plants lack chlorophyll
II. Vascular plants are all multicellular while nonvascular plants are unicellular
III. Vascular plants have transport system while nonvascular plants don’t have
I only
II only
III only
I and III only
Which of the following statement is FALSE?
Eating less and / or exercising more can result in weight loss.
Excessive calories are stored as fat, regardless of their original food source.
Carbohydrates and fats are preferentially used as fuel before proteins are used.
The average human has enough stored glycogen to supply calories for several weeks.
Which is NOT true of mosses? Mosses___
thrives in moist environment.
reproduce by means of seeds.
do not have conducting tissues.
do not have true roots, stems, and leaves.
The greatest storage capacity of calories per gram occurs with
carbohydrates
lipds/fats
minerals
proteins
Only a small amount of the energy stored in food is available to the next organism in a food chain because
Most of the energy is used for life processes.
Primary and secondary consumers compete for food.
There are more producers than consumers in a food chain.
There are fewer top consumers than produces in a food chain.
The following are the good effects of fibre in our body. Which of the following should be omitted from the list?
Promotes constipation
Cleanses digestive tract
Prevents certain diseases
Regulates bowel movement
Which of the following sets of animals share a four chambered heart?
frogs & birds
Crocodiles & birds
crocodiles &lizards
Mammals &birds
Which group of organisms has the greatest biomass?
filter feeders
first order carnivores
algae and phytoplankton
Second order carnivores
Which of the following two organisms are producers?
plants and consumers
algae and phytoplankton
Consumers and phytoplankton
Phytoplankton and chlorophyll
Which of the following sets of animals belong to a single taxonomic group?
cuttlefish, jellyfish, starfish
Bat, pigeon, butterfly
monkey, chimpanzee, man
silkworm, tapeworm, earthworm
Preserving biodiversity is important because it _______
creates more jobs.
makes our country popular.
is an indicator of a healthy ecosystem.
is nice to have a variety of species in the ecosystem.
Why is absorption of digested food needed? It is to be able to____
achieved wellness.
breakdown the food into smaller pieces.
prepare the body for everyday activities.
assimilate the nutrients and energy from foods.
Which pair of statements correctly contrasts birds and mammals?
Birds are egg – laying. No mammals are egg-laying.
Birds are cold-blooded. Mammals are warm - blooded.
Birds have air sacs in addition to lungs. Mammals have no such sacs.
Birds lack a septum between the ventricles. Mammals have such a septum.
The term gymnosperm means:
naked seeds
flowering plants
Seedless plant
Seed plant
Why is biodiversity important to ecosystems? Biodiversity____
increases at each level of the food chain.
helps populations adapt to ecological changes.
reduces the number of insects in a given ecosystem
allows animals to feed permanently from one type of plant.
What waste product released during the cycle is necessary for the survival of animals?
sunlight
oxygen
Carbon dioxide
Water
Using the figure, in what way is the organism interdependent?
Plants give off oxygen for plant use.
Animal give off carbon dioxide for animal use.
Plant use oxygen for food production while animals use carbon dioxide for respiration.
Plant use carbon dioxide for food production while animals use oxygen for respiration.
Why are different enzymes needed for digestion? It is needed because ____
different enzymes can promote proper digestion.
different enzymes can lead to healthier body condition.
many enzymes can alter the speed of chemical digestion.
there is a specific kind of enzyme for each kind of nutrient to be digested.
Production of bile is one of several important function of the
gall bladder
liver
Pancreas
Small intestine
During the interphase, the chromosomes are difficult to see but are quite active in the synthesis of DNA and proteins. Which phases belong to the interphase?
Cytokinesis , G1 phase, S phase
G1 phase, S phase, and G2 phase
Cytokinesis, G1 phase, S phase, G2 phase
G1 phase, S phase, G2 phase, and prophase
In which stage does Cytokinesis is divide to form two individual cells?
mitosis
G2 phase
G1 phase
S phase
In each case where Mendel crossed homozygous plants as parents, the offspring displayed only one of the two traits seen in the parents. This observation supports the principle of_________
Segregation
allele frequency
independent assortment
dominance and recessiveness
